Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland

doi:10.1007/s11104-016-3071-2

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland
	Xu, Zhuwen ; Ren, Haiyan ; Li, Mai-He ; Brunner, Ivano 3; Yin, Jinfei ; Liu, Heyong ; Kong, Deliang 4; Lu, Xiao-Tao ; Sun, Tao ; Cai, Jiangping
刊名	PLANT AND SOIL
	2017
卷号	412 期号:1-2 页码:369-380
关键词	Belowground net primary production Carbon cycle Global change Nitrogen deposition Soil nitrogen Precipitation increase
ISSN号	0032-079X
DOI	10.1007/s11104-016-3071-2
文献子类	Article
英文摘要	Background and aims Evidence for impacts of environmental changes on belowground net primary production (BNPP) from long-term experiments is rather scarce. We aimed to understand how long-term changes in water and nitrogen availability affect production and vertical allocation of roots in semi-arid grasslands and its consequence on carbon (C) and nitrogen (N) cycles. Methods We investigated changes of BNPP and its vertical allocation along the soil profile to 40 cm in depth in response to simultaneous increases in water and N availability over 11 years in an old-field grassland in northern China. Results Water addition increased BNPP in all soil layers (0-10 cm, 10-20 cm, and 20-40 cm), and enhanced the percentage BNPP in the upper soils but decreased that in 10-20 cm soil layer. Nitrogen addition decreased BNPP in 10-20 cm and 20-40 cm soil layers as well as total BNPP in 0-40 cm, and increased the percentage BNPP in the upper soil layer but decreased that in 10-20 cm soil layer. Water addition increased soil total C and N concentrations in 0-10 cm and 10-20 cm soil layers, while N addition only marginally decreased soil C:N ratio in 0-10 cm and 20-40 cm soil layers. Both soil total N concentration and soil C: N ratio were closely related to BNPP. Conclusions Our results highlight the importance of environmental factors, especially water availability, in determining BNPP, and in turn controlling soil nutrient accumulation in semi-arid grasslands, although the specific mechanisms remain unclear. The projected increase in precipitation in those semi-arid grasslands would enhance soil C and N sequestration. The increased allocation of BNPP in upper soils with long-term precipitation increment and N deposition may accelerate thecycles of C and N in these ecosystems, and thus increase the risk of soil C and N loss.
学科主题	Agriculture ; Plant Sciences
电子版国际标准刊号	1573-5036
出版地	DORDRECHT
WOS关键词	NET PRIMARY PRODUCTIVITY ; SOIL CARBON ; INCREASED PRECIPITATION ; TYPICAL STEPPE ; MICROBIAL RESPIRATION ; FINE ROOTS ; LIFE-SPAN ; DYNAMICS ; ECOSYSTEM ; AVAILABILITY
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000399020200027
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31370009, 41371251, 31300387] ; National Key Research and Development Program of China [2016YFC0500707] ; Swiss Federal Research Institute WSL
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/22138]
专题	植被与环境变化国家重点实验室
作者单位	1.Henan Univ, Coll Life Sci, Int Joint Lab Global Change Biol, Kaifeng 475004, Henan, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 3.Swiss Fed Res Inst WSL, Forest Dynam, CH-8903 Birmensdorf, Switzerland 4.Swiss Fed Res Inst WSL, Forest Soils & Biogeochem, CH-8903 Birmensdorf, Switzerland 5.Shenyang Agr Univ, Coll Biosci & Biotechnol, Shenyang 110866, Liaoning, Peoples R China 6.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Xu, Zhuwen,Ren, Haiyan,Li, Mai-He,et al. Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland[J]. PLANT AND SOIL,2017,412(1-2):369-380.
APA	Xu, Zhuwen.,Ren, Haiyan.,Li, Mai-He.,Brunner, Ivano.,Yin, Jinfei.,...&Jiang, Yong.(2017).Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland.PLANT AND SOIL,412(1-2),369-380.
MLA	Xu, Zhuwen,et al."Experimentally increased water and nitrogen affect root production and vertical allocation of an old-field grassland".PLANT AND SOIL 412.1-2(2017):369-380.